PDF malware analysis — malicious · 6d550b2b567c399c

MALICIOUS

PDF

46.9 KB Created: 2020-10-26 20:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: c52ad182bf19f44d639c66e553f0f977 SHA-1: 8383f9cf46d7bb75c2e6de884e82b979db9dd618 SHA-256: 6d550b2b567c399c4fa882005ec9e5801b6d901597565b1d67ba48b9980ab94f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One prominent URL, 'https://ggtraff.ru/strik?keyword=ivet+dog+food+review', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ggtraff.ru/strik?keyword=ivet+dog+food+review In PDF document text
- https://cdn-cms.f-static.net/uploads/4407552/normal_5f95597194e29.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369654/normal_5f94c74f51906.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393346/normal_5f8f77a7b04db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370080/normal_5f8fa93b1c0db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368478/normal_5f8efe9b7065d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375195/normal_5f95f7b757b56.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366628/normal_5f9634822dc57.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/46c61306-237e-4112-ac9d-5736fcd0ed8d/sper_ot_2_filmi_trke_dublaj_full.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea26ae81-f02c-4e77-ae4a-a707c12bc6e5/6941942054.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3cdd2f9e-c3e1-43e8-b4e5-05ef1652d3d2/15703416239.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1417aa22-4395-483c-9b7b-dcb78a6f44e2/19269745829.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e2dd3f4-da4d-47db-a0df-1b31a239c677/75474340887.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7d1fdb03-487d-45bc-85b7-384dd10c04f7/indian_express_telegram_channel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ac9b765d-df05-422b-a959-e8baa0067e4b/47142154818.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31be173e-9915-4eb1-b046-9c46163bab59/black_panther_full_movie.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/9565/4564/files/indian_art_history_books.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/1332/2398/files/12076998019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a6d0a56a-1003-45d3-8cd0-cfa614db176e/14503791190.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49c1eeff-358a-4878-833e-9570e40bc88a/analise_interna_do_poema.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bb50520-6151-4107-b435-037620197716/26769026293.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006bde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BDE	4424 bytes
SHA-256: `782fd53a56c21e4345e63f686c8f8886b65c03d22a74b37f292c1e1aea57a84c`
`font_01_sfnt_off00007b10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B10	11220 bytes
SHA-256: `785617b9ec551f0e2d1d938321619b905f0f32cc9b7882e40a54efdb4226f2dd`
`font_02_sfnt_off0000a03b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA03B	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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